Add Marketplace option to toolbar and add to world menu

Also hidden in this commit is the ability to add buttons/menu entries for
your favorite websites to be opened in the in-viewer browser
Just make a button that calls "ShowWebFloater" and passes the URL as param

indra/newview/app_settings/settings_ascent.xml

@@ -1829,6 +1829,19 @@ Changing this setting only affects new text.</string>
       <key>IsCOA</key>
       <integer>1</integer>
     </map>
+    <key>ToolbarVisibleMarketplace</key>
+    <map>
+      <key>Comment</key>
+      <string>Whether or not the button for marketplace is on the toolbar</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>Boolean</string>
+      <key>Value</key>
+      <boolean>0</boolean>
+      <key>IsCOA</key>
+      <integer>1</integer>
+    </map>
     <key>ToolbarVisibleMarketplaceListings</key>
     <map>
       <key>Comment</key>